diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b960190..f03ac29 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Python ${{ matrix.python }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: set up Python
       uses: actions/setup-python@v4
       with: